Commit | Line | Data |
---|---|---|
c66ac9db NB |
1 | /* |
2 | * CDB emulation for non-READ/WRITE commands. | |
3 | * | |
4 | * Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc. | |
5 | * Copyright (c) 2005, 2006, 2007 SBE, Inc. | |
6 | * Copyright (c) 2007-2010 Rising Tide Systems | |
7 | * Copyright (c) 2008-2010 Linux-iSCSI.org | |
8 | * | |
9 | * Nicholas A. Bellinger <nab@kernel.org> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
24 | */ | |
25 | ||
11650b85 | 26 | #include <linux/kernel.h> |
c9abb9bb | 27 | #include <linux/module.h> |
c66ac9db NB |
28 | #include <asm/unaligned.h> |
29 | #include <scsi/scsi.h> | |
30 | ||
31 | #include <target/target_core_base.h> | |
c4795fb2 CH |
32 | #include <target/target_core_backend.h> |
33 | #include <target/target_core_fabric.h> | |
e26d99ae CH |
34 | |
35 | #include "target_core_internal.h" | |
c66ac9db NB |
36 | #include "target_core_ua.h" |
37 | ||
38 | static void | |
39 | target_fill_alua_data(struct se_port *port, unsigned char *buf) | |
40 | { | |
41 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
42 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
43 | ||
44 | /* | |
45 | * Set SCCS for MAINTENANCE_IN + REPORT_TARGET_PORT_GROUPS. | |
46 | */ | |
47 | buf[5] = 0x80; | |
48 | ||
49 | /* | |
50 | * Set TPGS field for explict and/or implict ALUA access type | |
51 | * and opteration. | |
52 | * | |
53 | * See spc4r17 section 6.4.2 Table 135 | |
54 | */ | |
55 | if (!port) | |
56 | return; | |
57 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
58 | if (!tg_pt_gp_mem) | |
59 | return; | |
60 | ||
61 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
62 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
63 | if (tg_pt_gp) | |
64 | buf[5] |= tg_pt_gp->tg_pt_gp_alua_access_type; | |
65 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
66 | } | |
67 | ||
68 | static int | |
69 | target_emulate_inquiry_std(struct se_cmd *cmd) | |
70 | { | |
e3d6f909 | 71 | struct se_lun *lun = cmd->se_lun; |
5951146d | 72 | struct se_device *dev = cmd->se_dev; |
052605c6 | 73 | struct se_portal_group *tpg = lun->lun_sep->sep_tpg; |
05d1c7c0 | 74 | unsigned char *buf; |
c66ac9db NB |
75 | |
76 | /* | |
77 | * Make sure we at least have 6 bytes of INQUIRY response | |
78 | * payload going back for EVPD=0 | |
79 | */ | |
80 | if (cmd->data_length < 6) { | |
6708bb27 | 81 | pr_err("SCSI Inquiry payload length: %u" |
c66ac9db | 82 | " too small for EVPD=0\n", cmd->data_length); |
e3d6f909 | 83 | return -EINVAL; |
c66ac9db NB |
84 | } |
85 | ||
4949314c | 86 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 87 | |
052605c6 NB |
88 | if (dev == tpg->tpg_virt_lun0.lun_se_dev) { |
89 | buf[0] = 0x3f; /* Not connected */ | |
90 | } else { | |
91 | buf[0] = dev->transport->get_device_type(dev); | |
92 | if (buf[0] == TYPE_TAPE) | |
93 | buf[1] = 0x80; | |
94 | } | |
c66ac9db NB |
95 | buf[2] = dev->transport->get_device_rev(dev); |
96 | ||
ce136176 RD |
97 | /* |
98 | * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 | |
99 | * | |
100 | * SPC4 says: | |
101 | * A RESPONSE DATA FORMAT field set to 2h indicates that the | |
102 | * standard INQUIRY data is in the format defined in this | |
103 | * standard. Response data format values less than 2h are | |
104 | * obsolete. Response data format values greater than 2h are | |
105 | * reserved. | |
106 | */ | |
107 | buf[3] = 2; | |
108 | ||
c66ac9db NB |
109 | /* |
110 | * Enable SCCS and TPGS fields for Emulated ALUA | |
111 | */ | |
e3d6f909 | 112 | if (dev->se_sub_dev->t10_alua.alua_type == SPC3_ALUA_EMULATED) |
c66ac9db NB |
113 | target_fill_alua_data(lun->lun_sep, buf); |
114 | ||
115 | if (cmd->data_length < 8) { | |
116 | buf[4] = 1; /* Set additional length to 1 */ | |
05d1c7c0 | 117 | goto out; |
c66ac9db NB |
118 | } |
119 | ||
120 | buf[7] = 0x32; /* Sync=1 and CmdQue=1 */ | |
121 | ||
122 | /* | |
123 | * Do not include vendor, product, reversion info in INQUIRY | |
124 | * response payload for cdbs with a small allocation length. | |
125 | */ | |
126 | if (cmd->data_length < 36) { | |
127 | buf[4] = 3; /* Set additional length to 3 */ | |
05d1c7c0 | 128 | goto out; |
c66ac9db NB |
129 | } |
130 | ||
8359cf43 JE |
131 | snprintf(&buf[8], 8, "LIO-ORG"); |
132 | snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model); | |
133 | snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision); | |
c66ac9db | 134 | buf[4] = 31; /* Set additional length to 31 */ |
05d1c7c0 AG |
135 | |
136 | out: | |
4949314c | 137 | transport_kunmap_data_sg(cmd); |
c66ac9db NB |
138 | return 0; |
139 | } | |
140 | ||
c66ac9db NB |
141 | /* unit serial number */ |
142 | static int | |
143 | target_emulate_evpd_80(struct se_cmd *cmd, unsigned char *buf) | |
144 | { | |
5951146d | 145 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
146 | u16 len = 0; |
147 | ||
c66ac9db NB |
148 | if (dev->se_sub_dev->su_dev_flags & |
149 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
150 | u32 unit_serial_len; | |
151 | ||
8359cf43 | 152 | unit_serial_len = strlen(dev->se_sub_dev->t10_wwn.unit_serial); |
c66ac9db NB |
153 | unit_serial_len++; /* For NULL Terminator */ |
154 | ||
155 | if (((len + 4) + unit_serial_len) > cmd->data_length) { | |
156 | len += unit_serial_len; | |
157 | buf[2] = ((len >> 8) & 0xff); | |
158 | buf[3] = (len & 0xff); | |
159 | return 0; | |
160 | } | |
8359cf43 JE |
161 | len += sprintf(&buf[4], "%s", |
162 | dev->se_sub_dev->t10_wwn.unit_serial); | |
c66ac9db NB |
163 | len++; /* Extra Byte for NULL Terminator */ |
164 | buf[3] = len; | |
165 | } | |
166 | return 0; | |
167 | } | |
168 | ||
784eb99e | 169 | static void |
b6b4e61f | 170 | target_parse_naa_6h_vendor_specific(struct se_device *dev, unsigned char *buf) |
784eb99e NB |
171 | { |
172 | unsigned char *p = &dev->se_sub_dev->t10_wwn.unit_serial[0]; | |
b6b4e61f AS |
173 | int cnt; |
174 | bool next = true; | |
175 | ||
784eb99e NB |
176 | /* |
177 | * Generate up to 36 bits of VENDOR SPECIFIC IDENTIFIER starting on | |
178 | * byte 3 bit 3-0 for NAA IEEE Registered Extended DESIGNATOR field | |
179 | * format, followed by 64 bits of VENDOR SPECIFIC IDENTIFIER EXTENSION | |
180 | * to complete the payload. These are based from VPD=0x80 PRODUCT SERIAL | |
181 | * NUMBER set via vpd_unit_serial in target_core_configfs.c to ensure | |
182 | * per device uniqeness. | |
183 | */ | |
b6b4e61f AS |
184 | for (cnt = 0; *p && cnt < 13; p++) { |
185 | int val = hex_to_bin(*p); | |
186 | ||
187 | if (val < 0) | |
784eb99e | 188 | continue; |
b6b4e61f AS |
189 | |
190 | if (next) { | |
191 | next = false; | |
192 | buf[cnt++] |= val; | |
784eb99e | 193 | } else { |
b6b4e61f AS |
194 | next = true; |
195 | buf[cnt] = val << 4; | |
784eb99e NB |
196 | } |
197 | } | |
198 | } | |
199 | ||
c66ac9db NB |
200 | /* |
201 | * Device identification VPD, for a complete list of | |
202 | * DESIGNATOR TYPEs see spc4r17 Table 459. | |
203 | */ | |
204 | static int | |
205 | target_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) | |
206 | { | |
5951146d | 207 | struct se_device *dev = cmd->se_dev; |
e3d6f909 | 208 | struct se_lun *lun = cmd->se_lun; |
c66ac9db NB |
209 | struct se_port *port = NULL; |
210 | struct se_portal_group *tpg = NULL; | |
211 | struct t10_alua_lu_gp_member *lu_gp_mem; | |
212 | struct t10_alua_tg_pt_gp *tg_pt_gp; | |
213 | struct t10_alua_tg_pt_gp_member *tg_pt_gp_mem; | |
e3d6f909 | 214 | unsigned char *prod = &dev->se_sub_dev->t10_wwn.model[0]; |
c66ac9db NB |
215 | u32 prod_len; |
216 | u32 unit_serial_len, off = 0; | |
c66ac9db NB |
217 | u16 len = 0, id_len; |
218 | ||
c66ac9db NB |
219 | off = 4; |
220 | ||
221 | /* | |
222 | * NAA IEEE Registered Extended Assigned designator format, see | |
223 | * spc4r17 section 7.7.3.6.5 | |
224 | * | |
225 | * We depend upon a target_core_mod/ConfigFS provided | |
226 | * /sys/kernel/config/target/core/$HBA/$DEV/wwn/vpd_unit_serial | |
227 | * value in order to return the NAA id. | |
228 | */ | |
229 | if (!(dev->se_sub_dev->su_dev_flags & SDF_EMULATED_VPD_UNIT_SERIAL)) | |
230 | goto check_t10_vend_desc; | |
231 | ||
232 | if (off + 20 > cmd->data_length) | |
233 | goto check_t10_vend_desc; | |
234 | ||
235 | /* CODE SET == Binary */ | |
236 | buf[off++] = 0x1; | |
237 | ||
163cd5fa | 238 | /* Set ASSOCIATION == addressed logical unit: 0)b */ |
c66ac9db NB |
239 | buf[off] = 0x00; |
240 | ||
241 | /* Identifier/Designator type == NAA identifier */ | |
163cd5fa | 242 | buf[off++] |= 0x3; |
c66ac9db NB |
243 | off++; |
244 | ||
245 | /* Identifier/Designator length */ | |
246 | buf[off++] = 0x10; | |
247 | ||
248 | /* | |
249 | * Start NAA IEEE Registered Extended Identifier/Designator | |
250 | */ | |
251 | buf[off++] = (0x6 << 4); | |
252 | ||
253 | /* | |
254 | * Use OpenFabrics IEEE Company ID: 00 14 05 | |
255 | */ | |
256 | buf[off++] = 0x01; | |
257 | buf[off++] = 0x40; | |
258 | buf[off] = (0x5 << 4); | |
259 | ||
260 | /* | |
261 | * Return ConfigFS Unit Serial Number information for | |
262 | * VENDOR_SPECIFIC_IDENTIFIER and | |
263 | * VENDOR_SPECIFIC_IDENTIFIER_EXTENTION | |
264 | */ | |
784eb99e | 265 | target_parse_naa_6h_vendor_specific(dev, &buf[off]); |
11650b85 | 266 | |
c66ac9db NB |
267 | len = 20; |
268 | off = (len + 4); | |
269 | ||
270 | check_t10_vend_desc: | |
271 | /* | |
272 | * T10 Vendor Identifier Page, see spc4r17 section 7.7.3.4 | |
273 | */ | |
274 | id_len = 8; /* For Vendor field */ | |
275 | prod_len = 4; /* For VPD Header */ | |
276 | prod_len += 8; /* For Vendor field */ | |
277 | prod_len += strlen(prod); | |
278 | prod_len++; /* For : */ | |
279 | ||
280 | if (dev->se_sub_dev->su_dev_flags & | |
281 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
282 | unit_serial_len = | |
e3d6f909 | 283 | strlen(&dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
284 | unit_serial_len++; /* For NULL Terminator */ |
285 | ||
286 | if ((len + (id_len + 4) + | |
287 | (prod_len + unit_serial_len)) > | |
288 | cmd->data_length) { | |
289 | len += (prod_len + unit_serial_len); | |
290 | goto check_port; | |
291 | } | |
8359cf43 | 292 | id_len += sprintf(&buf[off+12], "%s:%s", prod, |
e3d6f909 | 293 | &dev->se_sub_dev->t10_wwn.unit_serial[0]); |
c66ac9db NB |
294 | } |
295 | buf[off] = 0x2; /* ASCII */ | |
296 | buf[off+1] = 0x1; /* T10 Vendor ID */ | |
297 | buf[off+2] = 0x0; | |
8359cf43 | 298 | memcpy(&buf[off+4], "LIO-ORG", 8); |
c66ac9db NB |
299 | /* Extra Byte for NULL Terminator */ |
300 | id_len++; | |
301 | /* Identifier Length */ | |
302 | buf[off+3] = id_len; | |
303 | /* Header size for Designation descriptor */ | |
304 | len += (id_len + 4); | |
305 | off += (id_len + 4); | |
306 | /* | |
307 | * struct se_port is only set for INQUIRY VPD=1 through $FABRIC_MOD | |
308 | */ | |
309 | check_port: | |
310 | port = lun->lun_sep; | |
311 | if (port) { | |
312 | struct t10_alua_lu_gp *lu_gp; | |
313 | u32 padding, scsi_name_len; | |
314 | u16 lu_gp_id = 0; | |
315 | u16 tg_pt_gp_id = 0; | |
316 | u16 tpgt; | |
317 | ||
318 | tpg = port->sep_tpg; | |
319 | /* | |
320 | * Relative target port identifer, see spc4r17 | |
321 | * section 7.7.3.7 | |
322 | * | |
323 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
324 | * section 7.5.1 Table 362 | |
325 | */ | |
326 | if (((len + 4) + 8) > cmd->data_length) { | |
327 | len += 8; | |
328 | goto check_tpgi; | |
329 | } | |
330 | buf[off] = | |
e3d6f909 | 331 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
332 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
333 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 334 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
335 | buf[off] |= 0x10; |
336 | /* DESIGNATOR TYPE == Relative target port identifer */ | |
337 | buf[off++] |= 0x4; | |
338 | off++; /* Skip over Reserved */ | |
339 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
340 | /* Skip over Obsolete field in RTPI payload | |
341 | * in Table 472 */ | |
342 | off += 2; | |
343 | buf[off++] = ((port->sep_rtpi >> 8) & 0xff); | |
344 | buf[off++] = (port->sep_rtpi & 0xff); | |
345 | len += 8; /* Header size + Designation descriptor */ | |
346 | /* | |
347 | * Target port group identifier, see spc4r17 | |
348 | * section 7.7.3.8 | |
349 | * | |
350 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
351 | * section 7.5.1 Table 362 | |
352 | */ | |
353 | check_tpgi: | |
e3d6f909 | 354 | if (dev->se_sub_dev->t10_alua.alua_type != |
c66ac9db NB |
355 | SPC3_ALUA_EMULATED) |
356 | goto check_scsi_name; | |
357 | ||
358 | if (((len + 4) + 8) > cmd->data_length) { | |
359 | len += 8; | |
360 | goto check_lu_gp; | |
361 | } | |
362 | tg_pt_gp_mem = port->sep_alua_tg_pt_gp_mem; | |
363 | if (!tg_pt_gp_mem) | |
364 | goto check_lu_gp; | |
365 | ||
366 | spin_lock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
367 | tg_pt_gp = tg_pt_gp_mem->tg_pt_gp; | |
6708bb27 | 368 | if (!tg_pt_gp) { |
c66ac9db NB |
369 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); |
370 | goto check_lu_gp; | |
371 | } | |
372 | tg_pt_gp_id = tg_pt_gp->tg_pt_gp_id; | |
373 | spin_unlock(&tg_pt_gp_mem->tg_pt_gp_mem_lock); | |
374 | ||
375 | buf[off] = | |
e3d6f909 | 376 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
377 | buf[off++] |= 0x1; /* CODE SET == Binary */ |
378 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 379 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
380 | buf[off] |= 0x10; |
381 | /* DESIGNATOR TYPE == Target port group identifier */ | |
382 | buf[off++] |= 0x5; | |
383 | off++; /* Skip over Reserved */ | |
384 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
385 | off += 2; /* Skip over Reserved Field */ | |
386 | buf[off++] = ((tg_pt_gp_id >> 8) & 0xff); | |
387 | buf[off++] = (tg_pt_gp_id & 0xff); | |
388 | len += 8; /* Header size + Designation descriptor */ | |
389 | /* | |
390 | * Logical Unit Group identifier, see spc4r17 | |
391 | * section 7.7.3.8 | |
392 | */ | |
393 | check_lu_gp: | |
394 | if (((len + 4) + 8) > cmd->data_length) { | |
395 | len += 8; | |
396 | goto check_scsi_name; | |
397 | } | |
398 | lu_gp_mem = dev->dev_alua_lu_gp_mem; | |
6708bb27 | 399 | if (!lu_gp_mem) |
c66ac9db NB |
400 | goto check_scsi_name; |
401 | ||
402 | spin_lock(&lu_gp_mem->lu_gp_mem_lock); | |
403 | lu_gp = lu_gp_mem->lu_gp; | |
6708bb27 | 404 | if (!lu_gp) { |
c66ac9db NB |
405 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); |
406 | goto check_scsi_name; | |
407 | } | |
408 | lu_gp_id = lu_gp->lu_gp_id; | |
409 | spin_unlock(&lu_gp_mem->lu_gp_mem_lock); | |
410 | ||
411 | buf[off++] |= 0x1; /* CODE SET == Binary */ | |
412 | /* DESIGNATOR TYPE == Logical Unit Group identifier */ | |
413 | buf[off++] |= 0x6; | |
414 | off++; /* Skip over Reserved */ | |
415 | buf[off++] = 4; /* DESIGNATOR LENGTH */ | |
416 | off += 2; /* Skip over Reserved Field */ | |
417 | buf[off++] = ((lu_gp_id >> 8) & 0xff); | |
418 | buf[off++] = (lu_gp_id & 0xff); | |
419 | len += 8; /* Header size + Designation descriptor */ | |
420 | /* | |
421 | * SCSI name string designator, see spc4r17 | |
422 | * section 7.7.3.11 | |
423 | * | |
424 | * Get the PROTOCOL IDENTIFIER as defined by spc4r17 | |
425 | * section 7.5.1 Table 362 | |
426 | */ | |
427 | check_scsi_name: | |
e3d6f909 | 428 | scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg)); |
c66ac9db NB |
429 | /* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */ |
430 | scsi_name_len += 10; | |
431 | /* Check for 4-byte padding */ | |
432 | padding = ((-scsi_name_len) & 3); | |
433 | if (padding != 0) | |
434 | scsi_name_len += padding; | |
435 | /* Header size + Designation descriptor */ | |
436 | scsi_name_len += 4; | |
437 | ||
438 | if (((len + 4) + scsi_name_len) > cmd->data_length) { | |
439 | len += scsi_name_len; | |
440 | goto set_len; | |
441 | } | |
442 | buf[off] = | |
e3d6f909 | 443 | (tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4); |
c66ac9db NB |
444 | buf[off++] |= 0x3; /* CODE SET == UTF-8 */ |
445 | buf[off] = 0x80; /* Set PIV=1 */ | |
163cd5fa | 446 | /* Set ASSOCIATION == target port: 01b */ |
c66ac9db NB |
447 | buf[off] |= 0x10; |
448 | /* DESIGNATOR TYPE == SCSI name string */ | |
449 | buf[off++] |= 0x8; | |
450 | off += 2; /* Skip over Reserved and length */ | |
451 | /* | |
452 | * SCSI name string identifer containing, $FABRIC_MOD | |
453 | * dependent information. For LIO-Target and iSCSI | |
454 | * Target Port, this means "<iSCSI name>,t,0x<TPGT> in | |
455 | * UTF-8 encoding. | |
456 | */ | |
e3d6f909 | 457 | tpgt = tpg->se_tpg_tfo->tpg_get_tag(tpg); |
c66ac9db | 458 | scsi_name_len = sprintf(&buf[off], "%s,t,0x%04x", |
e3d6f909 | 459 | tpg->se_tpg_tfo->tpg_get_wwn(tpg), tpgt); |
c66ac9db NB |
460 | scsi_name_len += 1 /* Include NULL terminator */; |
461 | /* | |
462 | * The null-terminated, null-padded (see 4.4.2) SCSI | |
463 | * NAME STRING field contains a UTF-8 format string. | |
464 | * The number of bytes in the SCSI NAME STRING field | |
465 | * (i.e., the value in the DESIGNATOR LENGTH field) | |
466 | * shall be no larger than 256 and shall be a multiple | |
467 | * of four. | |
468 | */ | |
469 | if (padding) | |
470 | scsi_name_len += padding; | |
471 | ||
472 | buf[off-1] = scsi_name_len; | |
473 | off += scsi_name_len; | |
474 | /* Header size + Designation descriptor */ | |
475 | len += (scsi_name_len + 4); | |
476 | } | |
477 | set_len: | |
478 | buf[2] = ((len >> 8) & 0xff); | |
479 | buf[3] = (len & 0xff); /* Page Length for VPD 0x83 */ | |
480 | return 0; | |
481 | } | |
482 | ||
483 | /* Extended INQUIRY Data VPD Page */ | |
484 | static int | |
485 | target_emulate_evpd_86(struct se_cmd *cmd, unsigned char *buf) | |
486 | { | |
487 | if (cmd->data_length < 60) | |
488 | return 0; | |
489 | ||
1289a057 | 490 | buf[3] = 0x3c; |
c66ac9db NB |
491 | /* Set HEADSUP, ORDSUP, SIMPSUP */ |
492 | buf[5] = 0x07; | |
493 | ||
494 | /* If WriteCache emulation is enabled, set V_SUP */ | |
5951146d | 495 | if (cmd->se_dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
496 | buf[6] = 0x01; |
497 | return 0; | |
498 | } | |
499 | ||
500 | /* Block Limits VPD page */ | |
501 | static int | |
502 | target_emulate_evpd_b0(struct se_cmd *cmd, unsigned char *buf) | |
503 | { | |
5951146d | 504 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
505 | int have_tp = 0; |
506 | ||
507 | /* | |
508 | * Following sbc3r22 section 6.5.3 Block Limits VPD page, when | |
509 | * emulate_tpu=1 or emulate_tpws=1 we will be expect a | |
510 | * different page length for Thin Provisioning. | |
511 | */ | |
e3d6f909 | 512 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
513 | have_tp = 1; |
514 | ||
515 | if (cmd->data_length < (0x10 + 4)) { | |
6708bb27 | 516 | pr_debug("Received data_length: %u" |
c66ac9db NB |
517 | " too small for EVPD 0xb0\n", |
518 | cmd->data_length); | |
e3d6f909 | 519 | return -EINVAL; |
c66ac9db NB |
520 | } |
521 | ||
522 | if (have_tp && cmd->data_length < (0x3c + 4)) { | |
6708bb27 | 523 | pr_debug("Received data_length: %u" |
c66ac9db NB |
524 | " too small for TPE=1 EVPD 0xb0\n", |
525 | cmd->data_length); | |
526 | have_tp = 0; | |
527 | } | |
528 | ||
529 | buf[0] = dev->transport->get_device_type(dev); | |
c66ac9db NB |
530 | buf[3] = have_tp ? 0x3c : 0x10; |
531 | ||
6708bb27 AG |
532 | /* Set WSNZ to 1 */ |
533 | buf[4] = 0x01; | |
534 | ||
c66ac9db NB |
535 | /* |
536 | * Set OPTIMAL TRANSFER LENGTH GRANULARITY | |
537 | */ | |
538 | put_unaligned_be16(1, &buf[6]); | |
539 | ||
540 | /* | |
541 | * Set MAXIMUM TRANSFER LENGTH | |
542 | */ | |
e3d6f909 | 543 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_sectors, &buf[8]); |
c66ac9db NB |
544 | |
545 | /* | |
546 | * Set OPTIMAL TRANSFER LENGTH | |
547 | */ | |
e3d6f909 | 548 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.optimal_sectors, &buf[12]); |
c66ac9db NB |
549 | |
550 | /* | |
551 | * Exit now if we don't support TP or the initiator sent a too | |
552 | * short buffer. | |
553 | */ | |
554 | if (!have_tp || cmd->data_length < (0x3c + 4)) | |
555 | return 0; | |
556 | ||
557 | /* | |
558 | * Set MAXIMUM UNMAP LBA COUNT | |
559 | */ | |
e3d6f909 | 560 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_lba_count, &buf[20]); |
c66ac9db NB |
561 | |
562 | /* | |
563 | * Set MAXIMUM UNMAP BLOCK DESCRIPTOR COUNT | |
564 | */ | |
e3d6f909 | 565 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.max_unmap_block_desc_count, |
c66ac9db NB |
566 | &buf[24]); |
567 | ||
568 | /* | |
569 | * Set OPTIMAL UNMAP GRANULARITY | |
570 | */ | |
e3d6f909 | 571 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity, &buf[28]); |
c66ac9db NB |
572 | |
573 | /* | |
574 | * UNMAP GRANULARITY ALIGNMENT | |
575 | */ | |
e3d6f909 | 576 | put_unaligned_be32(dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment, |
c66ac9db | 577 | &buf[32]); |
e3d6f909 | 578 | if (dev->se_sub_dev->se_dev_attrib.unmap_granularity_alignment != 0) |
c66ac9db NB |
579 | buf[32] |= 0x80; /* Set the UGAVALID bit */ |
580 | ||
581 | return 0; | |
582 | } | |
583 | ||
e22a7f07 RD |
584 | /* Block Device Characteristics VPD page */ |
585 | static int | |
586 | target_emulate_evpd_b1(struct se_cmd *cmd, unsigned char *buf) | |
587 | { | |
588 | struct se_device *dev = cmd->se_dev; | |
589 | ||
590 | buf[0] = dev->transport->get_device_type(dev); | |
591 | buf[3] = 0x3c; | |
592 | ||
593 | if (cmd->data_length >= 5 && | |
594 | dev->se_sub_dev->se_dev_attrib.is_nonrot) | |
595 | buf[5] = 1; | |
596 | ||
597 | return 0; | |
598 | } | |
599 | ||
c66ac9db NB |
600 | /* Thin Provisioning VPD */ |
601 | static int | |
602 | target_emulate_evpd_b2(struct se_cmd *cmd, unsigned char *buf) | |
603 | { | |
5951146d | 604 | struct se_device *dev = cmd->se_dev; |
c66ac9db NB |
605 | |
606 | /* | |
607 | * From sbc3r22 section 6.5.4 Thin Provisioning VPD page: | |
608 | * | |
609 | * The PAGE LENGTH field is defined in SPC-4. If the DP bit is set to | |
610 | * zero, then the page length shall be set to 0004h. If the DP bit | |
611 | * is set to one, then the page length shall be set to the value | |
612 | * defined in table 162. | |
613 | */ | |
614 | buf[0] = dev->transport->get_device_type(dev); | |
c66ac9db NB |
615 | |
616 | /* | |
617 | * Set Hardcoded length mentioned above for DP=0 | |
618 | */ | |
619 | put_unaligned_be16(0x0004, &buf[2]); | |
620 | ||
621 | /* | |
622 | * The THRESHOLD EXPONENT field indicates the threshold set size in | |
623 | * LBAs as a power of 2 (i.e., the threshold set size is equal to | |
624 | * 2(threshold exponent)). | |
625 | * | |
626 | * Note that this is currently set to 0x00 as mkp says it will be | |
627 | * changing again. We can enable this once it has settled in T10 | |
628 | * and is actually used by Linux/SCSI ML code. | |
629 | */ | |
630 | buf[4] = 0x00; | |
631 | ||
632 | /* | |
633 | * A TPU bit set to one indicates that the device server supports | |
634 | * the UNMAP command (see 5.25). A TPU bit set to zero indicates | |
635 | * that the device server does not support the UNMAP command. | |
636 | */ | |
e3d6f909 | 637 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu != 0) |
c66ac9db NB |
638 | buf[5] = 0x80; |
639 | ||
640 | /* | |
641 | * A TPWS bit set to one indicates that the device server supports | |
642 | * the use of the WRITE SAME (16) command (see 5.42) to unmap LBAs. | |
643 | * A TPWS bit set to zero indicates that the device server does not | |
644 | * support the use of the WRITE SAME (16) command to unmap LBAs. | |
645 | */ | |
e3d6f909 | 646 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpws != 0) |
c66ac9db NB |
647 | buf[5] |= 0x40; |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
b2eb705e RD |
652 | static int |
653 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf); | |
654 | ||
655 | static struct { | |
656 | uint8_t page; | |
657 | int (*emulate)(struct se_cmd *, unsigned char *); | |
658 | } evpd_handlers[] = { | |
659 | { .page = 0x00, .emulate = target_emulate_evpd_00 }, | |
660 | { .page = 0x80, .emulate = target_emulate_evpd_80 }, | |
661 | { .page = 0x83, .emulate = target_emulate_evpd_83 }, | |
662 | { .page = 0x86, .emulate = target_emulate_evpd_86 }, | |
663 | { .page = 0xb0, .emulate = target_emulate_evpd_b0 }, | |
e22a7f07 | 664 | { .page = 0xb1, .emulate = target_emulate_evpd_b1 }, |
b2eb705e RD |
665 | { .page = 0xb2, .emulate = target_emulate_evpd_b2 }, |
666 | }; | |
667 | ||
668 | /* supported vital product data pages */ | |
669 | static int | |
670 | target_emulate_evpd_00(struct se_cmd *cmd, unsigned char *buf) | |
671 | { | |
672 | int p; | |
673 | ||
674 | if (cmd->data_length < 8) | |
675 | return 0; | |
676 | /* | |
677 | * Only report the INQUIRY EVPD=1 pages after a valid NAA | |
678 | * Registered Extended LUN WWN has been set via ConfigFS | |
679 | * during device creation/restart. | |
680 | */ | |
681 | if (cmd->se_dev->se_sub_dev->su_dev_flags & | |
682 | SDF_EMULATED_VPD_UNIT_SERIAL) { | |
683 | buf[3] = ARRAY_SIZE(evpd_handlers); | |
684 | for (p = 0; p < min_t(int, ARRAY_SIZE(evpd_handlers), | |
685 | cmd->data_length - 4); ++p) | |
686 | buf[p + 4] = evpd_handlers[p].page; | |
687 | } | |
688 | ||
689 | return 0; | |
690 | } | |
691 | ||
5bda90c8 | 692 | int target_emulate_inquiry(struct se_task *task) |
c66ac9db | 693 | { |
6ed5a557 | 694 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 695 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 696 | unsigned char *buf; |
a1d8b49a | 697 | unsigned char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 698 | int p, ret; |
c66ac9db | 699 | |
d29a5b6a CH |
700 | if (!(cdb[1] & 0x1)) { |
701 | ret = target_emulate_inquiry_std(cmd); | |
702 | goto out; | |
703 | } | |
c66ac9db NB |
704 | |
705 | /* | |
706 | * Make sure we at least have 4 bytes of INQUIRY response | |
707 | * payload for 0x00 going back for EVPD=1. Note that 0x80 | |
708 | * and 0x83 will check for enough payload data length and | |
709 | * jump to set_len: label when there is not enough inquiry EVPD | |
710 | * payload length left for the next outgoing EVPD metadata | |
711 | */ | |
712 | if (cmd->data_length < 4) { | |
6708bb27 | 713 | pr_err("SCSI Inquiry payload length: %u" |
c66ac9db | 714 | " too small for EVPD=1\n", cmd->data_length); |
03e98c9e | 715 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
e3d6f909 | 716 | return -EINVAL; |
c66ac9db | 717 | } |
05d1c7c0 | 718 | |
4949314c | 719 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 720 | |
c66ac9db NB |
721 | buf[0] = dev->transport->get_device_type(dev); |
722 | ||
d29a5b6a | 723 | for (p = 0; p < ARRAY_SIZE(evpd_handlers); ++p) { |
b2eb705e RD |
724 | if (cdb[2] == evpd_handlers[p].page) { |
725 | buf[1] = cdb[2]; | |
05d1c7c0 | 726 | ret = evpd_handlers[p].emulate(cmd, buf); |
d29a5b6a | 727 | goto out_unmap; |
b2eb705e | 728 | } |
d29a5b6a | 729 | } |
c66ac9db | 730 | |
6708bb27 | 731 | pr_err("Unknown VPD Code: 0x%02x\n", cdb[2]); |
bb1acb2e | 732 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
d29a5b6a CH |
733 | ret = -EINVAL; |
734 | ||
735 | out_unmap: | |
4949314c | 736 | transport_kunmap_data_sg(cmd); |
d29a5b6a CH |
737 | out: |
738 | if (!ret) { | |
739 | task->task_scsi_status = GOOD; | |
740 | transport_complete_task(task, 1); | |
741 | } | |
742 | return ret; | |
c66ac9db NB |
743 | } |
744 | ||
5bda90c8 | 745 | int target_emulate_readcapacity(struct se_task *task) |
c66ac9db | 746 | { |
6ed5a557 | 747 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 748 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 749 | unsigned char *buf; |
904f0bc4 NB |
750 | unsigned long long blocks_long = dev->transport->get_blocks(dev); |
751 | u32 blocks; | |
752 | ||
753 | if (blocks_long >= 0x00000000ffffffff) | |
754 | blocks = 0xffffffff; | |
755 | else | |
756 | blocks = (u32)blocks_long; | |
c66ac9db | 757 | |
4949314c | 758 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 759 | |
c66ac9db NB |
760 | buf[0] = (blocks >> 24) & 0xff; |
761 | buf[1] = (blocks >> 16) & 0xff; | |
762 | buf[2] = (blocks >> 8) & 0xff; | |
763 | buf[3] = blocks & 0xff; | |
e3d6f909 AG |
764 | buf[4] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
765 | buf[5] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
766 | buf[6] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
767 | buf[7] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
768 | /* |
769 | * Set max 32-bit blocks to signal SERVICE ACTION READ_CAPACITY_16 | |
770 | */ | |
e3d6f909 | 771 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
772 | put_unaligned_be32(0xFFFFFFFF, &buf[0]); |
773 | ||
4949314c | 774 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 775 | |
d29a5b6a CH |
776 | task->task_scsi_status = GOOD; |
777 | transport_complete_task(task, 1); | |
c66ac9db NB |
778 | return 0; |
779 | } | |
780 | ||
5bda90c8 | 781 | int target_emulate_readcapacity_16(struct se_task *task) |
c66ac9db | 782 | { |
6ed5a557 | 783 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 784 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 785 | unsigned char *buf; |
c66ac9db NB |
786 | unsigned long long blocks = dev->transport->get_blocks(dev); |
787 | ||
4949314c | 788 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 789 | |
c66ac9db NB |
790 | buf[0] = (blocks >> 56) & 0xff; |
791 | buf[1] = (blocks >> 48) & 0xff; | |
792 | buf[2] = (blocks >> 40) & 0xff; | |
793 | buf[3] = (blocks >> 32) & 0xff; | |
794 | buf[4] = (blocks >> 24) & 0xff; | |
795 | buf[5] = (blocks >> 16) & 0xff; | |
796 | buf[6] = (blocks >> 8) & 0xff; | |
797 | buf[7] = blocks & 0xff; | |
e3d6f909 AG |
798 | buf[8] = (dev->se_sub_dev->se_dev_attrib.block_size >> 24) & 0xff; |
799 | buf[9] = (dev->se_sub_dev->se_dev_attrib.block_size >> 16) & 0xff; | |
800 | buf[10] = (dev->se_sub_dev->se_dev_attrib.block_size >> 8) & 0xff; | |
801 | buf[11] = dev->se_sub_dev->se_dev_attrib.block_size & 0xff; | |
c66ac9db NB |
802 | /* |
803 | * Set Thin Provisioning Enable bit following sbc3r22 in section | |
804 | * READ CAPACITY (16) byte 14 if emulate_tpu or emulate_tpws is enabled. | |
805 | */ | |
e3d6f909 | 806 | if (dev->se_sub_dev->se_dev_attrib.emulate_tpu || dev->se_sub_dev->se_dev_attrib.emulate_tpws) |
c66ac9db NB |
807 | buf[14] = 0x80; |
808 | ||
4949314c | 809 | transport_kunmap_data_sg(cmd); |
05d1c7c0 | 810 | |
d29a5b6a CH |
811 | task->task_scsi_status = GOOD; |
812 | transport_complete_task(task, 1); | |
c66ac9db NB |
813 | return 0; |
814 | } | |
815 | ||
816 | static int | |
817 | target_modesense_rwrecovery(unsigned char *p) | |
818 | { | |
819 | p[0] = 0x01; | |
820 | p[1] = 0x0a; | |
821 | ||
822 | return 12; | |
823 | } | |
824 | ||
825 | static int | |
826 | target_modesense_control(struct se_device *dev, unsigned char *p) | |
827 | { | |
828 | p[0] = 0x0a; | |
829 | p[1] = 0x0a; | |
830 | p[2] = 2; | |
5de619a3 NB |
831 | /* |
832 | * From spc4r23, 7.4.7 Control mode page | |
833 | * | |
834 | * The QUEUE ALGORITHM MODIFIER field (see table 368) specifies | |
835 | * restrictions on the algorithm used for reordering commands | |
836 | * having the SIMPLE task attribute (see SAM-4). | |
837 | * | |
838 | * Table 368 -- QUEUE ALGORITHM MODIFIER field | |
839 | * Code Description | |
840 | * 0h Restricted reordering | |
841 | * 1h Unrestricted reordering allowed | |
842 | * 2h to 7h Reserved | |
843 | * 8h to Fh Vendor specific | |
844 | * | |
845 | * A value of zero in the QUEUE ALGORITHM MODIFIER field specifies that | |
846 | * the device server shall order the processing sequence of commands | |
847 | * having the SIMPLE task attribute such that data integrity is maintained | |
848 | * for that I_T nexus (i.e., if the transmission of new SCSI transport protocol | |
849 | * requests is halted at any time, the final value of all data observable | |
850 | * on the medium shall be the same as if all the commands had been processed | |
851 | * with the ORDERED task attribute). | |
852 | * | |
853 | * A value of one in the QUEUE ALGORITHM MODIFIER field specifies that the | |
854 | * device server may reorder the processing sequence of commands having the | |
855 | * SIMPLE task attribute in any manner. Any data integrity exposures related to | |
856 | * command sequence order shall be explicitly handled by the application client | |
857 | * through the selection of appropriate ommands and task attributes. | |
858 | */ | |
859 | p[3] = (dev->se_sub_dev->se_dev_attrib.emulate_rest_reord == 1) ? 0x00 : 0x10; | |
c66ac9db NB |
860 | /* |
861 | * From spc4r17, section 7.4.6 Control mode Page | |
862 | * | |
863 | * Unit Attention interlocks control (UN_INTLCK_CTRL) to code 00b | |
864 | * | |
865 | * 00b: The logical unit shall clear any unit attention condition | |
866 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
867 | * status and shall not establish a unit attention condition when a com- | |
868 | * mand is completed with BUSY, TASK SET FULL, or RESERVATION CONFLICT | |
869 | * status. | |
870 | * | |
871 | * 10b: The logical unit shall not clear any unit attention condition | |
872 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
873 | * status and shall not establish a unit attention condition when | |
874 | * a command is completed with BUSY, TASK SET FULL, or RESERVATION | |
875 | * CONFLICT status. | |
876 | * | |
877 | * 11b a The logical unit shall not clear any unit attention condition | |
878 | * reported in the same I_T_L_Q nexus transaction as a CHECK CONDITION | |
879 | * status and shall establish a unit attention condition for the | |
880 | * initiator port associated with the I_T nexus on which the BUSY, | |
881 | * TASK SET FULL, or RESERVATION CONFLICT status is being returned. | |
882 | * Depending on the status, the additional sense code shall be set to | |
883 | * PREVIOUS BUSY STATUS, PREVIOUS TASK SET FULL STATUS, or PREVIOUS | |
884 | * RESERVATION CONFLICT STATUS. Until it is cleared by a REQUEST SENSE | |
885 | * command, a unit attention condition shall be established only once | |
886 | * for a BUSY, TASK SET FULL, or RESERVATION CONFLICT status regardless | |
887 | * to the number of commands completed with one of those status codes. | |
888 | */ | |
e3d6f909 AG |
889 | p[4] = (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 2) ? 0x30 : |
890 | (dev->se_sub_dev->se_dev_attrib.emulate_ua_intlck_ctrl == 1) ? 0x20 : 0x00; | |
c66ac9db NB |
891 | /* |
892 | * From spc4r17, section 7.4.6 Control mode Page | |
893 | * | |
894 | * Task Aborted Status (TAS) bit set to zero. | |
895 | * | |
896 | * A task aborted status (TAS) bit set to zero specifies that aborted | |
897 | * tasks shall be terminated by the device server without any response | |
898 | * to the application client. A TAS bit set to one specifies that tasks | |
899 | * aborted by the actions of an I_T nexus other than the I_T nexus on | |
900 | * which the command was received shall be completed with TASK ABORTED | |
901 | * status (see SAM-4). | |
902 | */ | |
e3d6f909 | 903 | p[5] = (dev->se_sub_dev->se_dev_attrib.emulate_tas) ? 0x40 : 0x00; |
c66ac9db NB |
904 | p[8] = 0xff; |
905 | p[9] = 0xff; | |
906 | p[11] = 30; | |
907 | ||
908 | return 12; | |
909 | } | |
910 | ||
911 | static int | |
912 | target_modesense_caching(struct se_device *dev, unsigned char *p) | |
913 | { | |
914 | p[0] = 0x08; | |
915 | p[1] = 0x12; | |
e3d6f909 | 916 | if (dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) |
c66ac9db NB |
917 | p[2] = 0x04; /* Write Cache Enable */ |
918 | p[12] = 0x20; /* Disabled Read Ahead */ | |
919 | ||
920 | return 20; | |
921 | } | |
922 | ||
923 | static void | |
924 | target_modesense_write_protect(unsigned char *buf, int type) | |
925 | { | |
926 | /* | |
927 | * I believe that the WP bit (bit 7) in the mode header is the same for | |
928 | * all device types.. | |
929 | */ | |
930 | switch (type) { | |
931 | case TYPE_DISK: | |
932 | case TYPE_TAPE: | |
933 | default: | |
934 | buf[0] |= 0x80; /* WP bit */ | |
935 | break; | |
936 | } | |
937 | } | |
938 | ||
939 | static void | |
940 | target_modesense_dpofua(unsigned char *buf, int type) | |
941 | { | |
942 | switch (type) { | |
943 | case TYPE_DISK: | |
944 | buf[0] |= 0x10; /* DPOFUA bit */ | |
945 | break; | |
946 | default: | |
947 | break; | |
948 | } | |
949 | } | |
950 | ||
5bda90c8 | 951 | int target_emulate_modesense(struct se_task *task) |
c66ac9db | 952 | { |
6ed5a557 | 953 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 954 | struct se_device *dev = cmd->se_dev; |
a1d8b49a | 955 | char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 956 | unsigned char *rbuf; |
c66ac9db | 957 | int type = dev->transport->get_device_type(dev); |
6ed5a557 CH |
958 | int ten = (cmd->t_task_cdb[0] == MODE_SENSE_10); |
959 | int offset = ten ? 8 : 4; | |
c66ac9db NB |
960 | int length = 0; |
961 | unsigned char buf[SE_MODE_PAGE_BUF]; | |
962 | ||
963 | memset(buf, 0, SE_MODE_PAGE_BUF); | |
964 | ||
965 | switch (cdb[2] & 0x3f) { | |
966 | case 0x01: | |
967 | length = target_modesense_rwrecovery(&buf[offset]); | |
968 | break; | |
969 | case 0x08: | |
970 | length = target_modesense_caching(dev, &buf[offset]); | |
971 | break; | |
972 | case 0x0a: | |
973 | length = target_modesense_control(dev, &buf[offset]); | |
974 | break; | |
975 | case 0x3f: | |
976 | length = target_modesense_rwrecovery(&buf[offset]); | |
977 | length += target_modesense_caching(dev, &buf[offset+length]); | |
978 | length += target_modesense_control(dev, &buf[offset+length]); | |
979 | break; | |
980 | default: | |
f15ea578 RD |
981 | pr_err("MODE SENSE: unimplemented page/subpage: 0x%02x/0x%02x\n", |
982 | cdb[2] & 0x3f, cdb[3]); | |
03e98c9e NB |
983 | cmd->scsi_sense_reason = TCM_UNKNOWN_MODE_PAGE; |
984 | return -EINVAL; | |
c66ac9db NB |
985 | } |
986 | offset += length; | |
987 | ||
988 | if (ten) { | |
989 | offset -= 2; | |
990 | buf[0] = (offset >> 8) & 0xff; | |
991 | buf[1] = offset & 0xff; | |
992 | ||
e3d6f909 | 993 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
994 | (cmd->se_deve && |
995 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
996 | target_modesense_write_protect(&buf[3], type); | |
997 | ||
e3d6f909 AG |
998 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
999 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
1000 | target_modesense_dpofua(&buf[3], type); |
1001 | ||
1002 | if ((offset + 2) > cmd->data_length) | |
1003 | offset = cmd->data_length; | |
1004 | ||
1005 | } else { | |
1006 | offset -= 1; | |
1007 | buf[0] = offset & 0xff; | |
1008 | ||
e3d6f909 | 1009 | if ((cmd->se_lun->lun_access & TRANSPORT_LUNFLAGS_READ_ONLY) || |
c66ac9db NB |
1010 | (cmd->se_deve && |
1011 | (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY))) | |
1012 | target_modesense_write_protect(&buf[2], type); | |
1013 | ||
e3d6f909 AG |
1014 | if ((dev->se_sub_dev->se_dev_attrib.emulate_write_cache > 0) && |
1015 | (dev->se_sub_dev->se_dev_attrib.emulate_fua_write > 0)) | |
c66ac9db NB |
1016 | target_modesense_dpofua(&buf[2], type); |
1017 | ||
1018 | if ((offset + 1) > cmd->data_length) | |
1019 | offset = cmd->data_length; | |
1020 | } | |
05d1c7c0 | 1021 | |
4949314c | 1022 | rbuf = transport_kmap_data_sg(cmd); |
c66ac9db | 1023 | memcpy(rbuf, buf, offset); |
4949314c | 1024 | transport_kunmap_data_sg(cmd); |
c66ac9db | 1025 | |
d29a5b6a CH |
1026 | task->task_scsi_status = GOOD; |
1027 | transport_complete_task(task, 1); | |
c66ac9db NB |
1028 | return 0; |
1029 | } | |
1030 | ||
5bda90c8 | 1031 | int target_emulate_request_sense(struct se_task *task) |
c66ac9db | 1032 | { |
6ed5a557 | 1033 | struct se_cmd *cmd = task->task_se_cmd; |
a1d8b49a | 1034 | unsigned char *cdb = cmd->t_task_cdb; |
05d1c7c0 | 1035 | unsigned char *buf; |
c66ac9db | 1036 | u8 ua_asc = 0, ua_ascq = 0; |
05d1c7c0 | 1037 | int err = 0; |
c66ac9db NB |
1038 | |
1039 | if (cdb[1] & 0x01) { | |
6708bb27 | 1040 | pr_err("REQUEST_SENSE description emulation not" |
c66ac9db | 1041 | " supported\n"); |
03e98c9e NB |
1042 | cmd->scsi_sense_reason = TCM_INVALID_CDB_FIELD; |
1043 | return -ENOSYS; | |
c66ac9db | 1044 | } |
05d1c7c0 | 1045 | |
4949314c | 1046 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 1047 | |
6708bb27 | 1048 | if (!core_scsi3_ua_clear_for_request_sense(cmd, &ua_asc, &ua_ascq)) { |
c66ac9db NB |
1049 | /* |
1050 | * CURRENT ERROR, UNIT ATTENTION | |
1051 | */ | |
1052 | buf[0] = 0x70; | |
1053 | buf[SPC_SENSE_KEY_OFFSET] = UNIT_ATTENTION; | |
1054 | /* | |
1055 | * Make sure request data length is enough for additional | |
1056 | * sense data. | |
1057 | */ | |
1058 | if (cmd->data_length <= 18) { | |
1059 | buf[7] = 0x00; | |
05d1c7c0 AG |
1060 | err = -EINVAL; |
1061 | goto end; | |
c66ac9db NB |
1062 | } |
1063 | /* | |
1064 | * The Additional Sense Code (ASC) from the UNIT ATTENTION | |
1065 | */ | |
1066 | buf[SPC_ASC_KEY_OFFSET] = ua_asc; | |
1067 | buf[SPC_ASCQ_KEY_OFFSET] = ua_ascq; | |
1068 | buf[7] = 0x0A; | |
1069 | } else { | |
1070 | /* | |
1071 | * CURRENT ERROR, NO SENSE | |
1072 | */ | |
1073 | buf[0] = 0x70; | |
1074 | buf[SPC_SENSE_KEY_OFFSET] = NO_SENSE; | |
1075 | /* | |
1076 | * Make sure request data length is enough for additional | |
1077 | * sense data. | |
1078 | */ | |
1079 | if (cmd->data_length <= 18) { | |
1080 | buf[7] = 0x00; | |
05d1c7c0 AG |
1081 | err = -EINVAL; |
1082 | goto end; | |
c66ac9db NB |
1083 | } |
1084 | /* | |
1085 | * NO ADDITIONAL SENSE INFORMATION | |
1086 | */ | |
1087 | buf[SPC_ASC_KEY_OFFSET] = 0x00; | |
1088 | buf[7] = 0x0A; | |
1089 | } | |
1090 | ||
05d1c7c0 | 1091 | end: |
4949314c | 1092 | transport_kunmap_data_sg(cmd); |
d29a5b6a CH |
1093 | task->task_scsi_status = GOOD; |
1094 | transport_complete_task(task, 1); | |
c66ac9db NB |
1095 | return 0; |
1096 | } | |
1097 | ||
1098 | /* | |
1099 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1100 | * Note this is not used for TCM/pSCSI passthrough | |
1101 | */ | |
5bda90c8 | 1102 | int target_emulate_unmap(struct se_task *task) |
c66ac9db | 1103 | { |
e3d6f909 | 1104 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1105 | struct se_device *dev = cmd->se_dev; |
05d1c7c0 | 1106 | unsigned char *buf, *ptr = NULL; |
a1d8b49a | 1107 | unsigned char *cdb = &cmd->t_task_cdb[0]; |
c66ac9db NB |
1108 | sector_t lba; |
1109 | unsigned int size = cmd->data_length, range; | |
05d1c7c0 | 1110 | int ret = 0, offset; |
c66ac9db NB |
1111 | unsigned short dl, bd_dl; |
1112 | ||
6ed5a557 CH |
1113 | if (!dev->transport->do_discard) { |
1114 | pr_err("UNMAP emulation not supported for: %s\n", | |
1115 | dev->transport->name); | |
03e98c9e NB |
1116 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1117 | return -ENOSYS; | |
6ed5a557 CH |
1118 | } |
1119 | ||
c66ac9db NB |
1120 | /* First UNMAP block descriptor starts at 8 byte offset */ |
1121 | offset = 8; | |
1122 | size -= 8; | |
1123 | dl = get_unaligned_be16(&cdb[0]); | |
1124 | bd_dl = get_unaligned_be16(&cdb[2]); | |
05d1c7c0 | 1125 | |
4949314c | 1126 | buf = transport_kmap_data_sg(cmd); |
05d1c7c0 | 1127 | |
c66ac9db | 1128 | ptr = &buf[offset]; |
6708bb27 | 1129 | pr_debug("UNMAP: Sub: %s Using dl: %hu bd_dl: %hu size: %hu" |
c66ac9db NB |
1130 | " ptr: %p\n", dev->transport->name, dl, bd_dl, size, ptr); |
1131 | ||
1132 | while (size) { | |
1133 | lba = get_unaligned_be64(&ptr[0]); | |
1134 | range = get_unaligned_be32(&ptr[8]); | |
6708bb27 | 1135 | pr_debug("UNMAP: Using lba: %llu and range: %u\n", |
c66ac9db NB |
1136 | (unsigned long long)lba, range); |
1137 | ||
1138 | ret = dev->transport->do_discard(dev, lba, range); | |
1139 | if (ret < 0) { | |
6708bb27 | 1140 | pr_err("blkdev_issue_discard() failed: %d\n", |
c66ac9db | 1141 | ret); |
05d1c7c0 | 1142 | goto err; |
c66ac9db NB |
1143 | } |
1144 | ||
1145 | ptr += 16; | |
1146 | size -= 16; | |
1147 | } | |
1148 | ||
05d1c7c0 | 1149 | err: |
4949314c | 1150 | transport_kunmap_data_sg(cmd); |
d29a5b6a CH |
1151 | if (!ret) { |
1152 | task->task_scsi_status = GOOD; | |
1153 | transport_complete_task(task, 1); | |
1154 | } | |
05d1c7c0 | 1155 | return ret; |
c66ac9db NB |
1156 | } |
1157 | ||
1158 | /* | |
1159 | * Used for TCM/IBLOCK and TCM/FILEIO for block/blk-lib.c level discard support. | |
1160 | * Note this is not used for TCM/pSCSI passthrough | |
1161 | */ | |
5bda90c8 | 1162 | int target_emulate_write_same(struct se_task *task) |
c66ac9db | 1163 | { |
e3d6f909 | 1164 | struct se_cmd *cmd = task->task_se_cmd; |
5951146d | 1165 | struct se_device *dev = cmd->se_dev; |
a1d8b49a AG |
1166 | sector_t range; |
1167 | sector_t lba = cmd->t_task_lba; | |
6ed5a557 | 1168 | u32 num_blocks; |
c66ac9db | 1169 | int ret; |
6ed5a557 CH |
1170 | |
1171 | if (!dev->transport->do_discard) { | |
1172 | pr_err("WRITE_SAME emulation not supported" | |
1173 | " for: %s\n", dev->transport->name); | |
03e98c9e NB |
1174 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1175 | return -ENOSYS; | |
6ed5a557 CH |
1176 | } |
1177 | ||
1178 | if (cmd->t_task_cdb[0] == WRITE_SAME) | |
1179 | num_blocks = get_unaligned_be16(&cmd->t_task_cdb[7]); | |
1180 | else if (cmd->t_task_cdb[0] == WRITE_SAME_16) | |
1181 | num_blocks = get_unaligned_be32(&cmd->t_task_cdb[10]); | |
1182 | else /* WRITE_SAME_32 via VARIABLE_LENGTH_CMD */ | |
1183 | num_blocks = get_unaligned_be32(&cmd->t_task_cdb[28]); | |
1184 | ||
dd3a5ad8 | 1185 | /* |
706d5860 NB |
1186 | * Use the explicit range when non zero is supplied, otherwise calculate |
1187 | * the remaining range based on ->get_blocks() - starting LBA. | |
dd3a5ad8 | 1188 | */ |
dd3a5ad8 NB |
1189 | if (num_blocks != 0) |
1190 | range = num_blocks; | |
1191 | else | |
1192 | range = (dev->transport->get_blocks(dev) - lba); | |
c66ac9db | 1193 | |
6708bb27 | 1194 | pr_debug("WRITE_SAME UNMAP: LBA: %llu Range: %llu\n", |
dd3a5ad8 | 1195 | (unsigned long long)lba, (unsigned long long)range); |
c66ac9db NB |
1196 | |
1197 | ret = dev->transport->do_discard(dev, lba, range); | |
1198 | if (ret < 0) { | |
6708bb27 | 1199 | pr_debug("blkdev_issue_discard() failed for WRITE_SAME\n"); |
e3d6f909 | 1200 | return ret; |
c66ac9db NB |
1201 | } |
1202 | ||
d29a5b6a CH |
1203 | task->task_scsi_status = GOOD; |
1204 | transport_complete_task(task, 1); | |
c66ac9db NB |
1205 | return 0; |
1206 | } | |
1207 | ||
5bda90c8 | 1208 | int target_emulate_synchronize_cache(struct se_task *task) |
6ed5a557 CH |
1209 | { |
1210 | struct se_device *dev = task->task_se_cmd->se_dev; | |
03e98c9e | 1211 | struct se_cmd *cmd = task->task_se_cmd; |
6ed5a557 CH |
1212 | |
1213 | if (!dev->transport->do_sync_cache) { | |
1214 | pr_err("SYNCHRONIZE_CACHE emulation not supported" | |
1215 | " for: %s\n", dev->transport->name); | |
03e98c9e NB |
1216 | cmd->scsi_sense_reason = TCM_UNSUPPORTED_SCSI_OPCODE; |
1217 | return -ENOSYS; | |
6ed5a557 CH |
1218 | } |
1219 | ||
1220 | dev->transport->do_sync_cache(task); | |
1221 | return 0; | |
1222 | } | |
1223 | ||
5bda90c8 | 1224 | int target_emulate_noop(struct se_task *task) |
d29a5b6a CH |
1225 | { |
1226 | task->task_scsi_status = GOOD; | |
1227 | transport_complete_task(task, 1); | |
1228 | return 0; | |
1229 | } | |
1230 | ||
485fd0d1 CH |
1231 | /* |
1232 | * Write a CDB into @cdb that is based on the one the intiator sent us, | |
1233 | * but updated to only cover the sectors that the current task handles. | |
1234 | */ | |
1235 | void target_get_task_cdb(struct se_task *task, unsigned char *cdb) | |
1236 | { | |
1237 | struct se_cmd *cmd = task->task_se_cmd; | |
b937d270 | 1238 | unsigned int cdb_len = scsi_command_size(cmd->t_task_cdb); |
485fd0d1 | 1239 | |
b937d270 | 1240 | memcpy(cdb, cmd->t_task_cdb, cdb_len); |
485fd0d1 | 1241 | if (cmd->se_cmd_flags & SCF_SCSI_DATA_SG_IO_CDB) { |
b937d270 CH |
1242 | unsigned long long lba = task->task_lba; |
1243 | u32 sectors = task->task_sectors; | |
1244 | ||
1245 | switch (cdb_len) { | |
1246 | case 6: | |
1247 | /* 21-bit LBA and 8-bit sectors */ | |
1248 | cdb[1] = (lba >> 16) & 0x1f; | |
1249 | cdb[2] = (lba >> 8) & 0xff; | |
1250 | cdb[3] = lba & 0xff; | |
1251 | cdb[4] = sectors & 0xff; | |
1252 | break; | |
1253 | case 10: | |
1254 | /* 32-bit LBA and 16-bit sectors */ | |
1255 | put_unaligned_be32(lba, &cdb[2]); | |
1256 | put_unaligned_be16(sectors, &cdb[7]); | |
1257 | break; | |
1258 | case 12: | |
1259 | /* 32-bit LBA and 32-bit sectors */ | |
1260 | put_unaligned_be32(lba, &cdb[2]); | |
1261 | put_unaligned_be32(sectors, &cdb[6]); | |
1262 | break; | |
1263 | case 16: | |
1264 | /* 64-bit LBA and 32-bit sectors */ | |
1265 | put_unaligned_be64(lba, &cdb[2]); | |
1266 | put_unaligned_be32(sectors, &cdb[10]); | |
1267 | break; | |
1268 | case 32: | |
1269 | /* 64-bit LBA and 32-bit sectors, extended CDB */ | |
1270 | put_unaligned_be64(lba, &cdb[12]); | |
1271 | put_unaligned_be32(sectors, &cdb[28]); | |
1272 | break; | |
1273 | default: | |
1274 | BUG(); | |
1275 | } | |
485fd0d1 CH |
1276 | } |
1277 | } | |
1278 | EXPORT_SYMBOL(target_get_task_cdb); |